this is the deadliest shooting rampage at an elementary school in u.s. history. >> children, beautiful, beautiful children, who had simply come to school to learn and their day ended a very different way than any of us could possibly have imagined. evil visited this community today. >> and our coverage continues in a moment. we'll be right back. r their children to come out they thought they still alive ,,,,,, [ crickets chirping ] [ traffic passing ] ♪ [ music box: lullaby ] [ man on tv, indistinct ] ♪ [ lullaby continues ] [ baby coos ] [ man announcing ] millions are still exposed to the dangers... of secondhand smoke... and some of them can't do anything about it. ♪ [ continues ] [ gasping ] >>> they wouldn't even let us in the building. one of the cops the worst thing he had ever seen in his career. but it was when they told these parents. all these parents were waiting for their children to come out. they thought they were still alive. there's 20 parents that were just told that their children are dead. it was awful. >> when it comes to mass